Apparatus for feeding blanks.



M. DUNNEBIER & A. WINKLER.

APPARATUS FOR FEEDING BLANKS.

APPLICATION FILED JULY 2,1914.

Patented Sept. 14, 1915.

'ates the lowermost blank to at up APPARATUS FOR FEEDING BLANKS.

tain gummen It hasalso been proposed to gum the bottom blank of a pile by means of a moving device, such as a roller, which was applied with gum from a container.

-VVhen using a fountain gummer to gum the top blank of a pile, leakage of gum is apt to occur and such gum which leaks from the slot trickles down the sides of the blanks in the pile and may eventually interfere with the operation of the machine when the device is used in combination with an envelop folding machine. The moving devices for applying gum to the bottom blank are not always satisfactory. p

The object of-the present invention is to enable the proper gumming and withdrawal of the bottom blank of a pile, the gum' being applied by means'of what is known as a fountain gummer. A fountain gummer might be said to consist of a chamber containing gum, which is supplied under a de-.

sired head to a slot.

According to this invention the gummi-ng device comprises a fountain gummer provided with a gumming slot in contact with the bottom of the lowermost blank of a pile, which is partially supported on the gummer, and partly on a moving device which periodically and temporarily liberpermit of its withdrawal.

More especially the device, according to the present invention, comprises a fountain gummer, substantially L-shaped, with its gumming slot in contact with the lowermost blank of a pile which rests on the horizontally projecting leg of the gummer, while the opposite corners of the pile rest on two oppositely rotating horizontal incut disks Specification of Letters ratent. Patented] se t. lid: T915. Application filed July 2, 1914. Serial No. 848,655.

- which are arranged side by side and have their, peripheral edges spaced while a suction nozzle or equivalent mechanical removing device is adapted to operate on the lowermost blank in the space between the peripheral edges of the adjacent disks.

The invention will be more .readily understood from the following description of one convenient form illustrated by way of example in the accompanying drawings.

In these drawings: Figure -1"is a vertical sectional elevation showing the device ap plied at the feeding end of an envelop folding machine. Fig. 2 is a .plan of the device shown in Fig. 1.

In carrying the invention into effect according to the form shown, somewhat diagrammatically, in the accompanying drawings, the ,pile of blanks a is supported as regards its left hand edge in Fig. 1 on the horizontally projecting portion f of a fountain gummer g. The fountain gummer g is MAX nfimvnmnn AND ALFRED 'WINKLER, or NnUwIE n-oN-rnE-RHINE, GERMAN provided with a slot 7:. and a felt wiper in the known manner. One ledge of the slot is higher than the other and this higher ledge receives the tips so that after receiving gum from the felt this gum is not scraped off by the rear ledge. For the purpose of closing the slot when no blanks are resting on the gummer, a valve d supported on an arm e which is held upward by a spring i may be provided. The opposite end or edges of the blanks are supported by moving members consisting, in the form shown of disks 6,1). These disks are arranged side by side in a horizontal plane and their peripheral edges are spaced apart symmetrically in regard to the center line XY of the blanks. This center line is also the center line of movement of the bl nks when they are removed from the pile. The disks 1; are arranged to project only for a short distance under the vided with incut portions 0 of substantially triangular form. The portions 0 are adapted to come. opposite one another in the manner shown in Fig. 2, just at the time when the suction nozzle is, moves up into contact with the lowermost blank and starts its The disks 6 ro-;

downward motion again.

.tate in opposite directions indicated by the tate. At the same time the edge 12 moves arrows j. If now the nozzle khas deflected the blank downward as shown in Fig. 1, the edge I) ofthe incuts or slots 0 constitutes the line offlex of the blank. This line of flexing recedes rearwardly as the disks rounder the pile between the flexed blank and the rest of the pile. When the edge I) has moved away out of contact with the bottom of' the pile, the bottom blank is free to be .moved downward and away from the pile.

This movement draws the blank over the gum slot h whereby an even uniform coating of gum is applied to the blank. This gummed edge does not in any way come in contact with the disks 6 so that there is no danger of these disks becoming smeared or doing any damage to the blanks. The nozzle k flexes the blank downward until the is in the flexed position shown in Fig. 1, and.

is about to' be liberated by the nozzle 70.

The rollers m are supported on spindles 0 which also support the rollers 12. The spindles o are mounted on swinging arms 9. Springs 1" tend to pull the arms 9 to the left hand in Fig. 1 and consequently retain herollers m and p in contact with the feed ro n. The feed roll 11. is provided with a gap or recessed portion where it comes opposite the gummed portion of the blank.

Any suitable means may be employed for driving or moving the parts mentioned. The nozzle 70 may be mounted on an arm 8 pivoted at t and caused to swing by means of a cam u mounted on the axis of the roller n. Therollers m and p may be rotated by their contact with the feed roll a. The disks 6 are mounted on vertical axes which are rotated by bevel gearing 'v. The blanks gummed and fed as above described are led through the tapes w to the folding mechanism 2. An arcuate guide is may be provided to retain the blank flexed and guide it into the tapes w;

We claim:

1. Blank feeding mechanism comprising apertured rotary members, a support for a pile of blanks which also rest partially on said rotary members, a suction nozzle movable past said members to draw down the lowest blank through said apertures, means for flexing said blank away from said nozzle and means for further transporting the blank away from the pile.

2. In combination a support for a pile of blanks oppositely rotating apertured disks, a suction nozzle movable past said disks to flex the lowermost blank from the pile, rollers supported laterallyof said nozzle, overhanging segmented edges on said rollers said edges being located to engage the blank and separate it from the nozzle.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

MAX DUNNEBIER.

ALFRED WINKLER.

Witnesses LoUIs VANDonN, WILHELM KRAUP. 

